YKK: The zipping monopoly

Most zips carry the letters YKK on them. Tired of wondering why, Gaurav Sodhi investigates.

Look carefully at almost any piece of clothing with a zip attached to it and there’s a good chance you’ll see three subtly stamped letters: YKK. After years of wondering why so much of my clothing was YKK compliant, I decided to do some investigating.

YKK is the world’s largest manufacturer of zips. In fact, more than 90% of all the zips in the world are made by this one business. Where would you guess this titan of fastening was based? China? Vietnam? Nope. YKK is Japanese.

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